Beveled-glass-polishing machine



July 17, 1923. 31,462,303. B. REHM BEVELED GLASS POLISHING MACHINE Filed Sept. 5, 1918 Patented duty 1?, i923.

UNHTEfi STATES BENJAMIN RIGHT/I, OF CRYSTAL CITY, MISSOURI, 'ASSIGNOR GLASS COMPANY, A CORPORATION OF PENNSYLVANIA.

BEVELED-GLASS-POLISHING MACHINE.

I Application filed September 3, 1918. Serial No. 252,310.

To all whom it may concern:

Be it known that I, BENJAMIN Rania, a citizen of the United States, and a resident of Crystal City, in the county of Jefferson and State of Missouri, have made a new and useful invention in Beveled-Glass-Polishing Machines, of which the following is a speclfication.

The invention relates to polishing machines and involves an improvement upon the structure shown in my co-pending appli-' cation, Serial No. 178,179, filed July 2, 1917. The invention has for its principal objects the provision of improved means for maintaining the polishing wheel or disc of felt or other fibrous material in proper working shape, increasing the life of such disc and rendering it more efiicient in the polishing operation. One embodiment of the invention is illustrated in the accompanying drawings wherein:

Figure 1 is a side elevation of a polishing machine with the improvement applied thereto, Fig, 2 is a bottom plan view of a part of the apparatus of Fig. 1, and Figs. 8 and 4 are detail views, Fig. 3 showing the attachment constituting the improvement in side elevation, and Fig. 1 being a transverse section through. the attachment.

In general the machine is similar to that shown in my co-pending application, heretofore referred to, the invention relating primarily to an attachment to the machine designed to keep the. felt or other fabric constituting the polishing disc from spreading. The parts of the machine which are old and correspond to those shown in my co-pending application may be briefly described as follows. 1 is the table mounted for movement on the wheels 2 and carrying the sheet of glass 3 whose beveled edge is tobe polished; 4 is the polishing wheel comprising a pair of metal plates. 5 (Fig. 2) carriedby the axle 6 and having clamped between them the felt disc 7; 8 is a yoke in which the polishing wheel is mounted; 9 is a belt wheel also carried by the axle 6 and driven by means of a belt 10; and 11 is an overhead operating means corresponding to that shown in my co-pending application and connected by means of the parts 12, 13 and 14 with the framework bearing the polishing wheel whereby such wheel may be ad iusted laterally and vertically. It will be understood that there are a number of pollying outward ishing wheels arranged upon the axle 6, and that during the polishing operation the table is moved back and forth carrying the beveled edge of the glass beneath the edges of the polishing discs or wheels.

lhe attachment to which the invention particularly relates comprises, the pair of rollers 15-15 mounted .on opposite sides of the discv 7 and carried in the brackets 16 and 17 T hese rollers extend out past the edge of the' disc and during the polishing operation serve to prevent any spreading of the polishing wheel. Very considerable pressure is applied to the wheel in order to give the necessary polishing friction upon the beveled portion of the glass, and this pressure soon spreads out the polishing disc so that it is unsuitable for use. The rolls bring the felt back to its normal position and the felt may be worn out without widening or spreading and its efficiency may be maintained until it is completely worn down to the clamping plates 5.

The brackets 16 and 17 are preferably in the form of angles as indicated in Figs. 2 and 3 and are secured adjustably to the yoke 8 by means of the stud bolts 18 engaging the slots 19 in the brackets. In this manner the brackets can be adjusted so that the rollers will properly engage discs of somewhat varying diameters. The rollers are preferably adjusted so they normally apply a slight pressure to the sides of the disc. The attachment has been found to greatly prolong the life of the polishing disc and renders such disc as fully effective after it is worn down as whennew. The advantages of my improvement from a practical standpoint will be readily apparent to those skilled in the art.

What I claim is:

In. combination in a glass bevel polishing apparatus, a polishing disc of felt. clamping plates on opposite'sides of the disc engaging the inner portion thereof, and substantially parallel supporting rollers mounted opposite each. other on opposite sides of the disc in engagement with the portion thereof from said clamping plates and adapted to prevent spreading of the edge of the disc.

In testimony subscribed my name gust, 191.8.

1 BENJAMIN R IIM.

whereof, I have hereunto 'ro rr'r'rsnunerr PLATE this 15th day of Au- 

